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primary 5 | Maths
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Lyn
Lyn

primary 5 chevron_right Maths chevron_right Singapore

Pls help

Date Posted: 3 years ago
Views: 527

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AC Lim
Ac Lim's answer
12074 answers (A Helpful Person)
1st
Hope this helps
Lyn
Lyn
3 years ago
Thanks.
But I don't understand why 4/11 = 4/11 x 33 divide 1/5

Can help explain?
AC Lim
AC Lim
3 years ago
1/5 →33u {11/55 →33u}
4/11 → ? {20/55→?}
In this case, I changed all denominator to 55.
Common multiple of 5 and 11.
Therefore, we can say
11u→ 33
20u= 20u / 11u × 33 = 60.
...

...
Note: 4/11 is 4u of total 11u.
and 1/5 is 1u of total 5u.
Since total is the same, we made total to 55u.
Common multiple of 5 and 11.
AC Lim
AC Lim
3 years ago
If you can understand ..
1u —> 4
2u —> 8
3u —> 12

It is actually work this way
1u —> 4
2u = 2u/1u x 4 = 8

Therefore, if
A —-> B
C = C/A x B or C = C x B divide A

Now, we replace
A = 1/5
B= 33
C = 4/11

Then look we replace C = C/A x B or C = C x B divide A
4/11 = 4/11 x 33 divide 1/5
Lyn
Lyn
3 years ago
Thanks a lot!